That's the hook. We ALL think we can shoot better than the people on that show. And a lot of us are right. With our guns (sighted in for us) and our ammo (that we know where it prints).
Look at the slo-mo shots of bullets just missing the target by an inch or so (ok, some a lot more), lots of the shots are close, but the reactive targets need a direct hit to break. When you need a "10" an "8" is a miss.
Now I hand you a gun you have never shot before, and ammo of some kind. Tell me you can make bullseyes all the time. I can't, not until I learn where the sights and the ammo are shooting. Can you?
Also, notice that most of the contestants are some kind of champion in a specific discipline? Some are military or police trained, some are not. Nearly all are not "well rounded" shooters.
"I'm a revolver guy" "I'm a shotgun guy" I'm a Seal" etc. What ever they are, there are guns for them, and guns they are unlikely to be familiar with. Seals and cops don't practice much these days with lever actions and SAAs, etc.
Except for the run dodge and jump stuff (I'm old, fat, and borderline lazy) I can outshoot nearly everyone I've seen on the show, with my guns and ammo. Or at least, I think I could, if all I had to do was walk up to the line and shoot!
And thats one reason some of us watch, not giving a rip about the drama (other than being able to root for the real twerps to get eliminated), but because we want to watch the shooting, see how they do, and believe we could do as well or better.